Oil burner



Patented Apr. 9, 1935 UNITED sTA'TEs Aren't, OFFIC OIL BURNER Lee B. Mettler, Los Angeles, Calif. Application September 15, 1931', Serial No. 562,913 1 1 Claim. (01. 158-75) My invention relates to burners in which oil or other, combustible liquids are used as fuel.

An object of the invention is to construct and arrange an oil burner so that steam, air or any othersuitable gaseous substance underpressure may be used in order to atomize the liquid fuel that is ejected from the burner, and to provide the burner integrally with means forcompletely regulating the supply. of the atomizing agent at the tip of the burner without necessitating removal of the burner from the furnace or disturbing its connections. p

An object of the invention is to construct and arrange a burner so that the atomizing agent: is

" forcedby a twirling motion into the liquid fuel externally of the burnerin order to maximize the atomizing effectof the agent and to cause combustion of the fuel to be as near complete as possible.

Anotherobjectof the invention is to connect I theqsupply conduitsfor the liquid fuel and the atomizing agent with a burner by a common element, and to arrange theconnection between the burnerand the elementso that the burner can be quickly and easily secured to, or removedfrom, the element. A further object of the invention is to provide a simple, easy, understandable assembly, whereby the user is able to get the highest possible atomi zationlwith very slight eiiort' upon his part, irrespective of what kind of fuelis fed to the burner or whethersuoh fuel is under a high pressure, say 200 pounds, or low gravity pressureQor whether the atomizing agent is under high or low pressure, whether air or steam. I l V A still furtherobject is to provide a novel burner whereby the fuel supplied forcombustion may be preheated Within the burner. construction itself.

Another object of theinvention is to construct a novel burner of few parts, which are so arranged that the burner cannot easily-get out of order and so that a long life of the burner is assured.

Other objects, advantageaand features of invention may appear from the accompanying drawing, the subjoined detailed description, an the appended claim. V l

The drawing illustrates theinvention in the form I at present deem preferable.

Figure l isa side elevation of the oil burner, as applied to, and extended through a furnace wall of which only a portion is shown in section. The yoke, by which the burner is secured to the common element between the burner and the conduits for the fuel and the atomizing'agent, is shown in-full lines in'its burner-securing position,

being on a larger scale than Figs. 1, 2 and 3. v

and dot-and-dash lines indicate the yoke moved, to a burner-releasing position. v

Fig. 2 is a longitudinal axial section of the burner and its connecting means with its conduits for the fuel and the atomizing agent shown, connected thereto.

Fig. 3 is an end elevation of the burner; as'seen from the left in Fig. 1, and shows in mid-section a portion of the yoke and a portion of the common connecting element between the burner and the conduits for the fuel and the atomizing agent in order to disclose clearly thepivotal connection betweenthe yoke and the element.

Fig. 4. is a fragmental side elevation of the nozzle end of the fuel conducting tube, the View The burner 5 of my invention includes an; inlet member 6, in which are formed passages l" and 8, separated'by a wallfi. A common conducting element imwhich is bifurcated so as to form branches H and l2; has an end portion [3, adapted to be'seated on a seat portion M at the top of the member 6. vThe branch I I has therein a; passageway l5, and the branch I 2 has therein a passageway [6. These passageways lead through the body of the element-l0 to the, end portion 83 and are separated by a wall [1. When the element at is seated on the seat portion 14, i

the passage l5 communicates with the passage 1 through an opening I 8 in the seat portion, while the passage l6 communicates with the passage} through a similar opening !9 in the seat portion, the openings l8 and l9, like the passages 1 and 8, being separated from each other by the wall 9. A gasket 20', having openings adapted. toregister with the respective'openings l8 and'l9, is preferably placed on the seat portion I 4 and. insures a tight connection and the latter is bordered and protected by a flange 2 i, which, whentheelement is seatedon the seat portion, also surrounds and protects the end portion I 3. A conduit.22 provided with a valve, 23 and secured to the branch ll, communicates with'the passage 7 and with a source of liquid fuel'under pressure, and the passage 8 similarly communicates through a conduit 24 with a source for supplying an atomizing agent, I such as steam, air or any other suitable gaseous substance, under pressure, and said conduit 24is .latter may be screwed to adjusted position relative to the inlet member. Pins 21 are screwed into the wall of the tube so as to form handles by which the turning of the tube to adjusted positions may be facilitated, and a packing nut 28,

preferably provided peripherally with handles,

in the form of lugs 29, fits around the tube 26 and is adapted to be screwed externally upon an extension 6' of'member 6, while a packing 3|) in the nut and around the tube serves to make the connection between the tube and thejmember 6' tight when the nut is tightened upon the member 6'. Upon the outer endof the tube 26 is screwed an 1 atomizing nozzle member 3|, the outer end of which preferably is of a conical formationso that a conical seat portion 32 is formed in the nozzle and the nozzle outlet 33 is contracted and thereby adapted to concentrate the flow of the atomizing agent from the nozzle so that the agent will be directed across the flow of fuel as hereinafter morefully explained to thoroughlybreak up and atomize the liquid fuel.

. The'wall 9 in the inlet member 8 has therein a threaded opening, co-axial with the tube 26 and of adiameter smaller-than the inside diameter of the tube, and in this opening is screwed the inner end of a tube 34, which extends through the passage 8 and through the major portion of the tube 26 so that a space A is formed between the walls of the tubes26 and 34.. A fuel nozzle member 35, which is of. a smaller diameter than the inside diameter of the tube 26 and the nozzle 3| is provided with a valve portion 36 at its discharge end, and has throughout itslength a central opening 31, which terminates in an outlet '38 preferably ofa smaller diameter than the nozzle outlet 33; This -nozzle 'member '35 is screwed upon the outer end of the tube 34 so that the member 35 extends co-axially through the.

tube 26 and the nozz1e3|and is adapted to be enga'gedat its end'portion by the portion 32 of the" nozzle 3| and to close the outlet 33 in the atom-- izing nozzle'3l whenthe tube '26 has been adjusted relative to the member 6 a predetermined degree. At an intermediate portion .the fuel nozzle35 has :on its outer periphery a number of spirally arranged ribs 39 which snugly fit the inner wall of the atomizing nozzle 3|, thereby forming spiral channels 39 which give the atomizing agent a twirling motion as it leaves nozzle opening 33 to further assist in complete atomization of the liquidfuel,

, The element I is provided on opposite sides with bosses 40, and an opening 4| is formed through the bosses and 'thebody of the element.

A yoke 42 fits over the bosses at its free end 43 ma depression 41 in the underside of the inlet member, so that; when the member 6 is seated on the element Hi, the screw is adapted to hold the element and the inlet member positively secured v to each other.

Preferably integral with the branch l2 and the element |fl, is a supporting bracket 48, which is adapted to be secured by any suitablemeanssuch necessity of removing as bolt-and-nut means 49 to any suitable portion of the furnace wall B which has therein an opening 53 sufficiently large, for allowing the burner to pass therethrough, so that the burner, when connected with the element l0, extends through the wall into the furnace a predetermined distance.

By the construction of the inlet member 6, as described, easy access is had into the member and to each side of the wall 9 and to the passage 8. In the outer end portion of the passage 1 the inlet member has preferably a threaded opening, in which is screwed a plug-54, thus also providing easy access from that end into the pas- When the burner 5, connected with the furnace as before described, is in operation, oil will flow from the conduit 22,- under control of valve 23,

through the passage l5, the opening |8, the pas-' sage the tube 34 and willbe ejected from the fuel nozzle member 35 through the opening 38. It being assumed that the tube 26 has been adjusted so as to move the end portion 32 of'the nozzle 3| slightly away from the-valve portion 36 of the fuel nozzle member 35, as shown in Fig. 2, the atomizing agent will flow from the conduit 24 under control of valve25 through thepassage' I6, opening l9, through the tube 26,1n passage 8, and passage A that'isaround the tube. 34 and through the atomizing nozzle 3|, and the spiral channels'39', and will be ejected with'a twirling motion through the outlet 33 so as to cause "a nozzle farther 'awayfrom the fuel nozzle, as in I dicated by dot-and-dash lines in Fig. 2; Ingcrder to turn the tube 26, it is only necessary to loosen the packing nut, 28.

sired position, the nut 28 is again tightened so that the atomizing nozzle is thereby securely held in adjusted position relative to the valve member.

If it is desired to remove the burner 5 from the element ID, the valves 23 and 25 arefirst closed so as to prevent the fuel and the atomizing agent from flowing to the burner. The screw 46 is then loosened, and the yoke .42 is swung to a releasing position for clearing the inletmember 6, as indicated by dot-and-dash lines in Fig. 1,

when the burner can be easily removed from the element Ill, and withdrawn from the furnace. With the yoke in the dot-and-dash line position, as {shownin Fig. 1 the burner is just as easily connected with the element and is locked thereto when the yoke has beenswung to its adjusted position relative to the inlet member 6 and the screw 46 tightened.

From the foregoing it is evident that the 'bumer of my invention causes an efficient and thorough atomizing of theliquid fuel and, consequently, a complete combustion thereof. It is also evident that the element In serves a most useful'purpose as a common carrier for the oiland the atomizing agent from the conduits22 and 24 to the burner, and that, by the construction of the element and the construction of the inlet member 6 of the burner, a considerable saving of time is effected in connecting the burner with, or discon- When the tube has been adjusted until the atomizing nozzle is in the denecting it from, the conduits, as there will be no or disturbing the'supply V by reason of the atomizing agent passing around the fuel delivery tube 34, particularly when steam is used as an atomizing agent, that the liquid fuel will be preheated before delivery at the fuel nozzle and thereby further aid in complete atomization.

By constructing the atomizing and fuel nozzles with a conical formation as shown in Fig. 2, the atomizing agent will be delivered from its nozzle in a direction that will tend to force the atomizing agent across and through the liquid fuel being delivered from the fuel nozzle thereby causing a thorough breaking up of the fuel and intermingling of the fuel and atomizing agent to a state of complete atomization.

I claim:

An oil burner comprising a hollow inlet memher having a seat portion and provided with an interior wall which has therein an opening and is so arranged that a passage for liquid fuel is formed on one side of the wall and that a passage for an atomizing agent is formed on the other side of the wall, said passages opening through said seat portion; a tube provided externally at one end with a valve seat portion, and secured at its other end to the opening in the wall;'a

nozzle member surrounding the tube so as to allow the atomizing agent to pass through the nozzle member and having therein at one end a valve portion which is adapted to be seated on said valve seat; means adjustably connecting the nozzle member to the inlet member so; as to cause the nozzle member to communicate with the passage for the atomizing agent and to allow the nozzle member to be moved-with its valve portion toward, or away from, the seat portion of the tube; and a packing nut, which fits around the means connecting the nozzle member to the inlet member and is adapted to hold packing means therein, said nut being adapted to be secured on the inlet member so as to tighten the packing over the means connecting the nozzle member to the inlet member.

LEE B. METTLER. 

